**Rated the top free period and ovulation tracker app by the journal Obstetrics & Gynecology, a publication of the American College of Obstetricians and Gynecologists (ACOG).**

Clue is the only period tracker app that uses science to help you discover the unique patterns in your menstrual cycle. Track your period and health cycles along with millions of people for accurate information. Get personalized reminders about your period, PMS, ovulation, and fertility.

With Clue, your health will no longer be a mystery. Track and monitor your period and health trends with multiple mood trackers, exercise trackers, and health logs. Clue learns from you how you really are.

It’s quick and easy to track your period, PMS, and general health with Clue.

Period Tracking:
+ Track your period, flow heaviness, and the menstrual products you used.
+ Receive accurate predictions and calendar reminders before your next period, PMS, and ovulation.
+ Record even more with your health. Track sex, pain, moods, cervical fluid, and more.
+ Track and predict periods with our calendar. Easily view past periods, PMS, and fertility data, as well as upcoming predictions for your next three cycles.

Scientific Information:
+ Read in-depth information about the menstrual cycle, complete with medical and scientific references.
+ Check out an analysis of your current and past menstrual cycles, along with an overall average, to easily observe trends.
+ Clue uses an algorithm that learns from the data YOU input. The more you use it, the smarter it gets.
+ Enhanced iOS features, including reproductive health integration with the Health app, Touch ID and Today Extensions.

General Health Tracking:
+ Log your birth control, or plan for pregnancy.
+ Track your basal temperature for more accurate ovulation and fertility predictions—perfect if you’re trying to conceive.
+ Track your health through your period, PMS, birth control, ovulation, cramps, emotions, skin, hair, sleep, exercise and more.

Inclusivity for All Ages:
+ We promise to never use flowers, butterflies, euphemisms or pink—ever. Track and get just the health information you need.
+ Clue is a gender-neutral period planner and health information—for everyone who has a menstrual cycle.
+ Suitable for all ages from teenagers upwards.

Accessible Data:
+ Fastest data entry of any period tracker
+ Record of your period dates and symptoms
+ All of your data is on hand for doctor’s appointments
+ Import and sync data from other tracking apps like Apple Health
+ Track your basal temperature for even more accurate ovulation and fertility predictions—perfect if you are trying to conceive
+ Get to know your body and identify unique health patterns and trends

Subscription Information
Want more from Clue? In addition to the personalized insights you receive from the free version of Clue, you could get forecasts that predict when you might experience PMS, cramps, and other patterns in your cycle with Clue Premium.

1-month subscription for $9.99
6-month subscription for $35.99
12-month subscription for $47.99

Once purchased, subscriptions automatically renew unless auto-renew is turned off in your iTunes Account settings at least 24 hours before the end of the payment period.

Download Clue and start tracking your health today!

Please note: Clue – Period Tracker is not a contraceptive.

**We want to hear from you**
We love hearing from Clue users. Send your feedback, questions and suggestions to

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What's New

Version 4.0.6

Bug fixes

Ratings and Reviews

4.8 out of 5

4.2K Ratings

4.2K Ratings


This is a Nat Attack

I’ve tried a lot of different cycle-tracking apps and this is definitely my favorite!! However, I really wish that there was an option to indicate that you’re switching to a different brand of birth control! Also, I think it’s be nice if we had the option to arrange our days of the week according to the day of the week our pack starts on (so I start my packs on Thursday and I would like it if the weeks started on Thursdays for me). I think that would be nice, because when I went in to my gyno to switch birth control, she was interested in which week of my pack I was having the most issues and it’s really hard to tell if it’s set up like a traditional calendar. Lastly, there are a tonnnnn of options for tracking which I really love, but I know that one of the some women literally throw up for seemingly no reason at all (I, being one of them lol) and it’s be really nice to have that specifically! Because usually when this happens to me, I end up just saying I have the flu, but that’s not really accurate since there’s no fever!
Anyway, I know that’s a lot, lol, but I really do love this app and and definitely think it’s the best that’s out!



I suffer from Polycystic Ovary Syndrome and have a number of symptoms throughout my cycle which can seem random, but Clue helps me understand patterns and recognize anything out of the ordinary that I may need to discuss with my doctor. I also suffer from anxiety, and the tracker for emotions and motivations is so helpful. When I have a bad day and feel like my whole life is going badly I can look at the calendar and see how many days I've marked as "happy" days.

The other types of tracking are important to me for other reasons too. My mom died of ovarian cancer a year ago at a young age (early 40s) and I've since become worried about my health. My doctor told me that I should track my symptoms (i.e. any irregular pains) so I can have a peace of mind knowing that these problems are part of my regular cycle or something that needs to be checked.

The only thing I would suggest to the developers would be to incorporate a section to track regular, daily prescription medications. I currently use another app for this but if Clue could find out a way to add it on then it would just be unnecessary. Either way I love the app and it constantly is getting better.

Cannot live without this app.


I’ve been using this app for 2+ years. I downloaded this because I needed a period tracker and it had better reviews than the rest out there. During the course of the 2.5 years I’ve used the app, the app has only gotten better. This app has been so helpful for me in tracking my periods and UNDERSTANDING my cycle. The other period apps I’ve used have just tracked my cycle, plus they’ve been kind of cheesy. This is a great looking app for one, but more importantly it performs beautifully, it’s reliable....and it has ACTUALLY helpful information and tips to help you understand your body and your cycle. I cannot say enough about how amazing this app is. All of the features available to track symptoms and feelings have helped me to predict my cycle and know immediately if something is wrong or out of the ordinary. I’ve struggled with an eating disorder in the time I’ve been using the app, and the analysis section has helped me to understand how it’s affected my period and in what ways (using all the handy trackers!) anyways. Love this app, it’s an essential for all women in my book. Thank you HEAPS to the developers! ❤️🤗

Developer Response

Hi ! Thanks for your sweet feedback :) Please keep in touch. Let us know if there's anything we can do better and write us a message to
 With <3 from Berlin, Ana


BioWink GmbH
134.8 MB
Health & Fitness
Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, Danish, French, German, Hindi, Italian, Japanese, Korean, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese, Turkish
Age Rating
Rated 12+ for the following:
Infrequent/Mild Medical/Treatment Information
Infrequent/Mild Mature/Suggestive Themes
© BioWink GmbH
In-App Purchases
  1. 1 Month $6.99
  2. 12 Months $46.99
  3. 6 Months $29.49


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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